US3685994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic method for printing a screen structure for a cathode-ray tube
Assignee: RCA Licensing Corp
•
Filing: 1971-05-05
•
Granted: 1972-08-22
•
Expires: 1991-05-05
Abstract
Abstract A PHOTOGRAPHIC METHOD FOR PRINTING A SCREEN STRUCTURE FOR A CATHODE-RAY TUBE HAVING A SUPPORTING SURFACE, A SCREEN STRUCTURE ON THE SURFACE AND A APERTURED MASK SPACED FROM THE SCREEN, SAID METHOD COMPRISING (A) DEPOSITING A COATING COMPRISED OF A PHOTOSENSTIVE BINDER ON THE SURFACE, (B) EXPOSING PRESCRIBED AREAS OF THE COATING THROUGH THE APERTURE OF THE MASK TO LIGHT FROM A FIRST LIGHT SOURCE HAVING AN EQUIVALENT DIAMETER OF ABOUT 0.160 TO 0.200 INCH, (C) EXPOSING THE PRESCRIBED AREAS OF THE COATING THROUGH THE APERTURES OF THE MASK TO LIGHT FROM A SECOND LIGHT SOURCE HAVING AN EQUIVALENT DIAMETER OF ABOUT 0.080 TO 0.120 INCH, (D) AND THEN DEVELOPING THE EXPOSED COATING.
Inventors
- 👤 Harry Robert Frey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:41
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/20; H01J9/22; H01J9/227; H01J9/2271; H01J9/2272
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |